seqSQUARED_Bill of Materials
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seqSQUARED Bill of Materials
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Part QtyDesignatorsNote/s
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Logic BoardControl Board
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Universal + Eurorack Kit Contents
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PIC18F4420 w/ seqSQUARED firmware1IC1From hexinverter.net
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TL074 Quad Opamp3IC2, IC3, IC4
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TL072 Dual Opamp1IC6
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CD40106 Hex Inverter1IC7
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CD4052 Quad Analogue Switch1IC5
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LM7805 5V Linear Voltage Regulator1IC8
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2N3906 PNP Transistor2T1, T2
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20MHz Crystal Oscillator1X1HC49S package style
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40 pin DIP Socket (.6" width)1IC1
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16 pin DIP Socket1IC5
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14 pin DIP Socket4IC2, IC3, IC4, IC7
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8 pin DIP Socket1IC6
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1nF Ceramic Capacitor5C18-225mm lead spacing (1000pF or .001 µF)
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.01µF Ceramic Capacitor1C175mm lead spacing (10nF)
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.1µF Ceramic Capacitor 11C3, C4, C8-165mm lead spacing
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33pF Ceramic Capacitor2C1, C25mm lead spacing
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10µF Electrolytic Capacitor3C5, C6, C72.5mm lead spacing
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BAT85 Schottky Diode24D1-24
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1N4148 Small Signal Diode2D25, D261N914 is a possible substitution
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1kΩ Resistor1R75% is fine if you don't have 1%
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10kΩ Resistor1R65% is fine if you don't have 1%
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47kΩ Resistor2R4, R8You should use 1% for these
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68kΩ Resistor2R5, R9You should use 1% for these
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100kΩ Resistor3R1-35% is fine if you don't have 1%
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150Ω Resistor Array (Isolated)3RA3, RA6, RA710 pin SIP array. VERIFY PINOUT MATCHES WHEN SELECTING ALTERNATIVES!
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1kΩ Resistor Array (Isolated)4RA1, RA2, RA5RA810 pin SIP array. VERIFY PINOUT MATCHES WHEN SELECTING ALTERNATIVES!
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100kΩ Resistor Array (Bussed)1RA410 pin SIP array. VERIFY PINOUT MATCHES WHEN SELECTING ALTERNATIVES!
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20kΩ Resistor Array (Bussed)1RA910 pin SIP array. VERIFY PINOUT MATCHES WHEN SELECTING ALTERNATIVES!
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39kΩ Resistor Array (Bussed)1RA1010 pin SIP array. VERIFY PINOUT MATCHES WHEN SELECTING ALTERNATIVES!
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20 pin .1" pitch female single row header2H1, H2
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20 pin .1" pitch male single row header2H3, H4
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Green Superbright LED8SLED1-8If you want a different colour, make sure the forward voltage is around 3.2V to maintain the same brightness as the other LEDs (blue or white would work!)
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Yellow Superbright LED4PLED1-4If you want a different colour, make sure the forward voltage is around 1.8V to maintain the same brightness as the other LEDs (red or orange would work!)
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Red Superbright LED5PG1LED, PG2LED, CLED, KLED, ELEDIf you want a different colour, make sure the forward voltage is around 1.8V to maintain the same brightness as the other LEDs (yellow or orange would work!)
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Note that there is room on the control board for universal kit users to mount .1" spacing headers for each of the 14 jacks if they desire
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Included in Eurorack Kit only:
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2x5 pin .1" shrouded male IDC header1P1Non-shrouded is fine as well, it just won't have a tab to orient the cable then
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10 pin to 16 pin IDC Eurorack Power Cable1Power CableNote that seqSQUARED has a TEN pin connector, not 16 like some Eurorack modules.
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5kΩ 9mm Vertical Potentiometer (linear)5R.PAGE, R.CHA, R.DIV, R.SRC, R.STPIf using a substitute, be very certain that the footprint matches!
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1/8" Mono Vertical Jack14CLK, RST, CHA.CV, DIV.CV, CV.OUT, G.OUT, CV.A-D, G.A-DIf using a substitute, be very certain that the footprint matches!
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White PCB Mount Momentary Switch2SW.RST, SW.STEPIf using a substitute, be very certain that the footprint matches!
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Green PCB Mount Momentary Switch1SW.EDITIf using a substitute, be very certain that the footprint matches!
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.2x.4" 5mm LED PCB spacers17
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D-Shaft Knobs5
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Eurorack Panel:
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Re:Synthesis Eurorack Front Panel1http://www.resynthesis.co.uk
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